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Private Notes
In the late 1970s, six couples and three children took part in a unique experiment, spending 13 months living as our Iron Age ancestors would have done and forsaking all the trappings of the modern era. 30 years on, the series is revisited and members of the group tracked down to find out how the experience has shaped their lives since then.
Can a light aircraft crash due to low air density? What's the longest undersea tunnel a human can negotiate with no tanks? And how deep can a free-diver go? And hear some amazing examples of a sonic boom.
A cross between a ramp jump and a wall of death - It's tricky science. Find out why landing in crosswinds is one of the toughest challenges a pilot will face. And what is the best way to detonate an atomic bomb?
